Disk plow



Dec. 28, 1948.

L. C. HESTER DISK PLOW 2 Sheets-Sheet 1 Filed Aprfil 19, 1945 Aww.

Gtorneg:

Dec. 28, 1948. l.. c. HEsTER -v 2,457,151

- DISK PLow Filed April 19, 1945 v 2 Sheets-.Sheet 2l N B YQ@ "1 Y i x f i' 1 T N :inventor Gttornegs patented Dec. 28, 194g 'msKLoiW A ufn'evi' CunimingsfHestermismeme,'ili'lz.e Application Aplf19, 1945, Serial NOJESIS This .inventiol'rTeIates"to imp'rvementsiin disc gplows.

.it hasfbeen'proposed to employ coultersin confor cutting'anytypemfs'oil sovthat `the soil with dense-Vegetationmay vbeturnedover by -Succeedlng rotatingidiscsidisposed atl an angle 15o-the "directionofitravl of theiplow.

Another object-ofi the inventioriisthe provision of"a disc blowiha-Ving-a tiframe I*which@includes `a E-pa'ir offlongitudinally disposed-parati@ fb'ars on lieeleiim. (CL-meist) which-aremounted-#verticali'coulters :for cutting l fthe-#soil ftof a i predetermined Y"depth with y discs in "rear -o'f l'eacl'i-f @bulten locatedat tanfan'gle :thereto for y tu rningvvov'er -the'f'sdi1, l1saidi-frame' being j fspipoiitedibyfapairrof Wheelsatthe forward endiand fa= single lguideAv wheelaat lthe *rear rWh-chlis set at lsuohan angle @that 4itftresists theilat'eral 'thrust imparted :byitheidiscsiandrwill constantlmdirect thelplow in: aistraight'fline.

This .iinvention :will be `:best understoodffromia oonsiderationocf thezffdllowingvdetailed descriptiem-inwiewiof theacompanying draWingsiorming a part of the;specifications;.2neve11the1ess,;it Lis :to be understood tithat 4@the invention is @not conned ,to :the .-5 disclosure, v*Lbei'ng fsusceptible vfof lsuch :fchanges and modifications i as idene 4:ino material :departure ,from` theysalient: features .1f-of the inventionnas-expressed ln theappendedfclaim.

:Ln-the drawings:

,-.-.Fig. `1f is faoplanifview of; agi-plow; constructed according; to, theprincip1esfof.;my invention.

Figa 2 is afside'viewof thezsame.

i' =Fg. 3,.is .,a transyerse Vertical section taken along the line -3--3 of Fig. 1.

-..F'ig- `Lise ,transverse vertical section taken along the line-II--QA ,ofiFig1v.

.'Eig.. 5.1is. a Vertical section, takenfa'long theiine 5-5.,ofFig...4.

l Fig..6.is asimilaresectionshowng @the adjustment for the ispind1e.,; .ecomterl -Fig ,-is alfragmentary plan View showingthe hitc'lifbetween a., 'tracton and a plow.

"Figyais 'a side View 'in elevation of .thebearinjg. supportsfor l`afc'o'ulte'r with themarts'separated.

*""EigfQg'is' an renlarged front View of a Coulter DIOW.

the teeth o'f the 'r 3 portion of the frame adjacent the wheel 30 must be raised or lowered to maintain the proper depth of cut of the coulters 32 and 35.

A plate 31 is welded to the bar |6 and a crank plate 4D is pivoted on a bolt 4| which is supported by the bar I6. A wheel 3| is rotatably mounted on an axle 42 which is carried by the lower end of the plate 40.

A lever 45 is rigidly secured at 46 to the upper end of the plate 4Iland above `itspivotxlll'. This lever is provided with `a pawl 41 'whichengages teeth 48 of an arcuately shaped rack which is secured at 49 to the plate 31. The pawl 41 is of the usual type and is designed to be released from engagement with the teeth against the tension of a spring 50 mounted in a U-sh'ape bracket n away from the side of the line cut by the coulter 33 which determines the side wall of the furrow. When the coulter plows and 16 are moved through the soil for turning it laterally the pressure exerted on the coulter plows will tend to v swing the rear end of the plow toward the left. However, the wheel 64 will counteract this tendency and maintain the plow at all times in a straight line along the furrow. The angular disposition of the wheel 64 thu-s prevents the wheel from riding up over the top of the furrow during the forward travel of theplow.

` The bar I3 has a bent extension 86 turned at an angle to the bar and in parallel relation with 5| carried by the lever 45. Said lever adapted to rock the crank plate 40 "for r'aisin'g'the axle 42 of the Wheel 3| with respect to the barv|6 While the pawl 41 holds the lever and crank plate Ein position. A hand lever 52 is pivotally mounted Vthe. lever55 are,`identi ca1'intconstruction with the elements associatedV .with the lever 45 .the samereference numerals are applied to such similar elements associated with the lever 55. A lever 6I] is securedat 6I to a crank plate 62 pivoted on a bolt .63 carriedby the rear end of the longitudinal bar |2. ,Arear Wheeld'which has a broad atfacafas havef'thewheels 30 and 3|, is rotatably mounted'fonwanaxle 65 secured to the lower end of the 'vcrank'plate 62. Arack 65 is secured at'66 to a bar or plate .61 welded to the portion 640i the bar I2. Sincethe pawl and associated elements ,are of Midenticalv construction asv that shown` in connection with the lever 45 thesamereferen'ce numerals are em- Ployed-V e i, :1; f

' A bracket 10, extends rearwardly lfrom the portion 64 and va spring" TI"h as' o`n`e` end connected to the outer endofthebracket'whilejtheother end ofthe spring'is connected to the` lever 60. This 'spring tends to",I ineve the lever rearwardly when 'ahand lever 52 releases the pawl 41from operated for raising vor lowering the respective wheelsv 3|,.3Dand64 f,ormainta`inil1g the-top of isparticularly true during the plowing Y cause the wheel 30 Aacts'as aglevfeling wheel for the. raisingor lowering of theffrward Qef'nd. of the frameadjacent the'wheel 73|. Tli`e rearvvheel 64 will cooperate'to maintainjdisc vor coulter plows 15 and 16 at'the properrdepth' andlikeWiSe the'coulters 32and'33.f l

Referring more particularly'to Fig. l1 it will be seen that theljcoulterfplpw 15 is mounted on a bent portion 11 .of the bar I2. A second bent portion 18 forms aconnection between the angularly bent lportiony 11 'and the extremity |27@y of barl2. It will also be noted thatthe end Vportion v|'2a is inclined at a slight angle'to'th'ejlongitudinal bar I2 so that the verticalplane passingy through the center of the rear wheel 64rkwil1 likewiserbe at a slight angle to 'a vertical plane passing longitudinally throughthebar I2. ""Thes'light angular disposition of the wheel 64 with respect to the vertical plane passing through thenlongitudin'al bar I2 tends to cau-sethewheel/toftravelinl the direction indicated'wbyf he arrovvi'in Fig. land lthe bent portion 11 of the bar I2, A plate 8| is bolted at 82 to the bent extension 89 and is provided with an axle 83 upon which is mounted the coulter plow 16.

A, combined guard and scraper B4 is secured to the plate 8| and extends upwardly and is then curved downwardlyover the upper edge of the coulter plow- 'Eiland bent inwardly as shown at i-sconnected to the -bent extension 11 in the same 1 manner as is the plowkl tothe extension 89 so that the same referencernumerals will be employed in connection with thezidentical parts.

Since the coulters 32 and 33 have identically the same elements cooperatingto adjustably position the said coulters on they respectivebars I2 and I3 the same reference numeral-s will bev employed for said elements. The coulters 32 and 33 have a mountingwhich is adjustable on the respective bars I2 andl I3 and this `adjustable :mounting is shown more particularly in Figs. 4 to 6 inclusiveand- Fig. 8. A pair of bars 99 and and .9| are welded to the bar I2 as shown at 92.

These bars are vertically disposed and spaced from each other withthe top ends of the bars being slightly below the lower edge of the longitudinal bar lZ. These bars are provided with a plurality of passages 93 which are adapted to be alined with' passages 94m a plate 95 that carries ,an axle. 96.`v The inner end of the'axle is welded or secured in any approved manner to the plate 95'. vBolts 91'are adapted to be inserted through pairs `of the alinedpa-ssages in the plate 95 and the bars 93 'and '9 i' foradjustably positioning the plate 95 and likewisethe-axle 96;` .f f A housing 98 is Ariveted'to a casing 99 and the vrivets as lshown in Fig. 4 pass-through perforationsin .the coulter 33 'so' that the coulter is lrigidly secured to thehousing 98 and the-casing v99. Bearings iand |9| -are seated within the housing 98 and embrace the aXle196. The outer end of' the housing 96 is `"clos'edeby a cap screw |92. A nut I03`is threaded onthe outer'end of theW axle 96 against'theibearing |0| for maintaining the coulter '33 rotatably'supportedon the axle 96. W l The coulter 32 has, identically ',thesame supporting structure and Y *therefore vthe same reference l'nurnerals'wln'ch are used in the supporting elements of thecoulter 33`are yapplied to the identical parts associated with the coulter 33. A comparison ofFigs. 5' and 6 willshow the ad-v justment of the plate 95 on the bars 96 'and 9| forraising or lowering the coulter as isfnecessary. During the plowingjopera'tion the plow is drawn over the surface by a tractor connectedv with the hitch bar 29. Thebrace bar 24 cooperatesl "with the bar 20 for maintaining the frame I6 always in a line with the direction of the travel of the tractor.

In this connection it may be pointed out that the rear wheel also cooperates with the particular construction of the hitch bar for maintaining the proper line of travel of the plow. In standard plows when an obstruction is met it is necessary to turn the plow to one side and pull it around the field to the point Where the obstruction is met and to one side of the same. However, with the present construction the plow can be backed up due to the fact that the hitch bar 20 and the brace bar 24 will permit the tractor to be reversed for backing the plow off of the obstruction.

The plow described herein is particularly efficient in plowing land which is covered with dense vegetation because the proper depth of the cutting of the coulters 92 and 33 is maintained at all times so that the coulter plows will be able to turn over the earth together with the dense vegetation. Furthermore, the broad flat faced Wheels will permit the plow to be drawn over soft earth or hard earth with equal facility.

I claim:

In a disc plow the combination with a frame comprising a forward cross piece having a short rearwardly extending wheel carrying arm at one end and a long rearwardly extending side rail at its other end, said side rail having a bent portion extending at an angle inwardly and a Wheel bearing extremity projecting therebeyond and lying at an obtuse angle to the forward portion of the side rail, an intermediate rail attached to the cross piece parallel to the side rail and of shorter length than the latter and provided with an inwardly bent extremity, and a rearwardly extending arched bracing member connecting rear portions of the two rails, of disc ploWs mounted on the angularly bent portions of the two rails, coulters on the parallel portions of the rails, disposed one ahead of the other, supporting wheels on the forward end of the frame and a ground wheel carrying the rear end of the side rail behind the disc thereon and rotating in a plane to resist the lateral thrust of the plow created by said discs.

LEVI CUMMINGS HESTER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 603,136 Gordon Apr. 26, 1898 625,764 Heylman May 30, 1899 702,022 Mecum June 10, 1902 773,871 Horner Nov. 1, 1904 1,256,984 Davis Feb. 19, 1918 1,509,310 Paul Sept. 23, 1924 2,132,166 Hester Oct. 4, 1938 

